Hello, I'm a biologist with a focus on mammalian physiology and behavior. I can provide you with information on the appearance of bat droppings.

Bat droppings, also known as guano, typically have a characteristic appearance. They are often dark brown in color and have a crumbly texture. The shape can vary, but they are usually tubular or rod-shaped with rounded ends. The size of the droppings can range from that of a grain of rice to a small cigar, depending on the size of the bat species. Bat guano is also known to be high in nitrogen and phosphorus, making it a valuable fertilizer in some agricultural contexts.

Here's the translation in Chinese:

你好，我是一位专注于哺乳动物生理学和行为学的生物学家。我可以为您提供关于蝙蝠粪便外观的信息。

蝙蝠粪便，也称为粪便，通常具有特定的外观。它们的颜色通常是深棕色，质地易碎。形状可能会有所不同，但它们通常是管状或棒状，两端呈圆形。粪便的大小可以从米粒大小到小雪茄那么大，这取决于蝙蝠的种类。蝙蝠粪便还因其高氮高磷而闻名，在某些农业环境中是一种有价值的肥料。

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What do bat droppings/guano/feces look like? ... If bats are suspected in an attic or closed space, looking for droppings is a good way to determine if there is an infestation. Bat droppings are called guano and are irregularly shaped and usually contain insect parts.read more >>